fix(cdk/table): update rows when row definitions change

[soltonigiri]

Fixes #20717.

CdkTable can receive an identity change from its iterable differ while a custom trackBy keeps the same row identity. Previously, renderRows() only updated the row data context, so a changed when result left the old row template rendered.

This change records the row definition used by each embedded row view and replaces only a view whose definition changes. Rows whose definitions are unchanged keep their existing DOM nodes.

Tests:

• pnpm -s bazel test --nocache_test_results //src/cdk/table:unit_tests_chromium
• pnpm -s tslint
• pnpm -s ng-dev format changed --check

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